Open pit mining: Mine Engineer.Com

Safety and Health Topics Respirable Crystalline Silica

Crystalline silica is a common mineral found in the earth's crust. Materials like sand, stone, concrete, and mortar contain crystalline silica. It is also used to make products such as glass, pottery, ceramics, bricks, and artificial stone. Respirable crystalline silica – very small particles at

uranium mining IPPNW: International Physicians for the

Glossary of Mining Terms Rock, Mineral and Fossil

Competent rock — Rock which, because of its physical and geological characteristics, is capable of sustaining openings without any structural support except pillars and walls left during mining (stalls, light props, and roof bolts are not considered structural support). Contact — The place or surface where two different kinds of rocks meet.